Tori Black would be my choice. The reason is that to me she seems more down-to-earth, everyday girl, while, although Sasha Grey has her charms, looks more fastidious and has an air of aristocracy. Sasha Grey is impeccably beautiful but her style of performance is too loud and mouthy for my taste. If she did some scenes in a rather quite, that would be much more erotic, arousing and artistically of higher aesthetic value.